Electrical Notes - York YCUL0016 User Manual

Electrical Notes

NOTES:
I . Minimum Circuit Ampacity (MCA) is based on 125% of the rated load amps for the largest motor plus 100% of the rated load
amps for all other loads included in the circuit, per N.E.C. Article 430-24. If the optional Factory Mounted Control Transformer
is provided, add the following MCA values to the electrical tables for the system providing power to the transformer: -17, add
2.5 amps; -28, add 2.3 amps; -40, add 1.5 amps, -46, add 1.3 amps; -58, add 1 amps.
2. Minimum fuse size is based upon 150% of the rated load amps for the largest motor plus 100% of the rated load amps
for all other loads included in the circuit to avoid nuisance trips at start-up due to lock rotor amps. It is not recommended
in applications where brown outs, frequent starting and stopping of the unit, and/or operation at ambient temperatures
in excess of 95ºF (35ºC) is anticipated.
3. Maximum fuse size is based upon 225% of the rated load amps for the largest motor plus 100% of the rated load amps for
all other loads included in the circuit, per N.E.C. Article 440.
4. The minimum recommended disconnect switch is based on 115% of the rated load amps for all loads included
in the circuit, per N.E.C. Article 440.
5. Circuit breakers must be UL listed and CSA certified and maximum size is based on 225% of the rated loadamps for
the largest motor plus 100% of the rated load amps for all other loads included in the circuit. Exception: YCUL0016 and
YCUL0026 must have the optional factory overloads installed to use a standard circuit breaker. Otherwise, an HACR-type
circuit breakers must be used. Maximum HACR circuit breaker rating is based on 225% of the rated load amps for the largest
motor plus 100% of the rated load amps for all other loads included in the circuit.
6. The "INCOMING WIRE RANGE" is the minimum and maximum wire size that can be accommodated by the unit wiring lugs.
The (2) preceding the wire range indicates the number of termination points available per phase of the wire range specified.
Actual wire size and number of wires per phase must be determined based on the National Electrical Code, USING COPPER
CONNECTORS ONLY. Field wiring must also comply with local codes.
7. A ground lug is provided for each compressor system to accommodate a field grounding conductor per N.E.C. Table
250-95. A control circuit grounding lug is also supplied.
8. The supplied disconnect is a "Disconnecting Means" as defined in the N.E.C. 100, and is intended for isolating the
unit for the available power supply to perform maintenance and troubleshooting. This disconnect is not intended to
be a Load Break Device.
9. Field Wiring by others which complies to the National Electrical Code & Local Codes.
LEGEND
ACR-LINE ACROSS THE LINE START
C.B. CIRCUIT BREAKER
D.E. DUAL ELEMENT FUSE
DISC SW DISCONNECT SWITCH
FACT MOUNT CB FACTORY MOUNTED CIRCUIT BREAKER
FLA FULL LOAD AMPS
HZ HERTZ
MAX MAXIMUM
MCA MINIMUM CIRCUIT AMPACITY
MIN MINIMUM
MIN NF MINIMUM NON FUSED
RLA RATED LOAD AMPS
S.P. WIRE SINGLE POINT WIRING
UNIT MTD SERV SW UNIT MOUNTED SERVICE (NON-FUSED DISCONNECT SWITCH)
LRA LOCKED ROTOR ARMS
102
VOLTAGE CODE
-17 = 200-3-60
-28 = 230-3-60
-40 = 380-3-60
-46 = 460-3-60
-58 = 575-3-60
YORK INTERNATIONAL